Abstract:

The prodelta slope of the third member of the Oligocene Shahejie Formation in Niuzhuang region,Shandong,is composed of slump slope,proximal gentle slope and distal slope.The slump and the debris flow sediments are well developed on slump slope;theliquefied-flow and the turbidity current sediments developed on gentle slope and the un-complite turbidity assemblage developed on distal slope.The controlling factors for the de-velopment of gravity-flow deposits on prodelta slope are deltaic progradation and the dou-ble-layer structure of the slope.Favourable regions for hydrocarbon enrichment are gentle slope.